A232485 a(1) = 3; thereafter a(n+1) = a(n) + product of digits of a(n).

3, 6, 12, 14, 18, 26, 38, 62, 74, 102, 102, 102, 102, 102, 102, 102, 102, 102, 102, 102, 102, 102, 102, 102, 102, 102, 102, 102, 102, 102, 102, 102, 102, 102, 102, 102, 102, 102, 102, 102, 102, 102, 102, 102, 102, 102, 102, 102, 102, 102, 102, 102, 102, 102, 102, 102, 102, 102, 102, 102, 102, 102, 102, 102, 102, 102

Offset

1,1

References

GCHQ, The GCHQ Puzzle Book, Penguin, 2016. See page 36.

Links

Table of n, a(n) for n=1..66.

Index entries for Colombian or self numbers and related sequences

Mathematica

NestList[#+Times@@IntegerDigits[#]&, 3, 70] (* Harvey P. Dale, Jul 02 2017 *)

Crossrefs

Cf. A063108, A230102, A232486.

Sequence in context: A274652 A339552 A102040 * A232486 A077152 A337747

Adjacent sequences: A232482 A232483 A232484 * A232486 A232487 A232488

Keyword

nonn,base

Author

N. J. A. Sloane, Nov 29 2013

Status

approved